How much petrol - 2 stroke?

[brownsox]

We have a 25 foot trailer sailer witha Yamaha 8hp 2 stroke in a well.
How many hours to the gallon are likely - ball park?
We hope not to motor much but need to know what size tank to carry.
Thanks

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[wicked]

I would suggest with a 2 stroke 8HP on a 25 footer you should use about 2 or 2.5 litres per hour at 5 knots.

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[Guest]

as big as you can live with without it interfering with sailing the boat.

I used to have a 5 gall OBD tank + 2 5 ltr cans spare for my Mercury 7.5 Sailpower. Average - used to last me the weekend easily around solent ... as long as I wasn't doing Beaulieu / Newport etc. too much with the motoring.


<hr width=100% size=1>Nigel ... and of course Yahoo groups :
http://groups.yahoo.com/group/gps-navigator/

 

[oldharry]

I had a Yam 9.9 on a heavy 21 footer, which averaged around three quarters of a gallon per hour at around 3/4 - 7/8 throttle. An earlier boat had a 6hp Yam and I seem to remember it went around .6 galls/hour. On a standard 5 gallon outboard tank that gave around 6.5 hours for the bigger engine and 8 hours for the smaller one. Yours should therefore fall about half way between the two.

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[VicS]

I have a 5 gallon (plastic) tank for a 6hp Evinrude which I reckon uses about ½gallon per hour.

It is a bit difficult to stow on a small boat and as I tend to keep it full I have rather more petrol on board than I need for most of the time. Also lots of expensive 2T oil mixed with it.

Next time it gets stolen I will probably replace it with 2 smaller tanks. That'll cost more but I will only fill and take the second tank when I'm likely to need it. Two small tanks will also be easier to stow.

<hr width=100% size=1><font color=purple>Ne te confundant illegitimi.</font color=purple>

 

[Ubergeekian]

4 horsepower-hours per gallon is a reasonable rule of thumb, I find.

Ian

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[Georgio]

Yam 4hp 2stroke uses aprox 1ltr/hr at cruising speed on 24ft yacht.

not the same but hope it helps.

G

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